Duck the system music while playing notification sound

BimmerGestalt · Sep 23, 2024 · b4dda91 · b4dda91
1 parent ae37e4a
commit b4dda91
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Showing 3 changed files with 44 additions and 1 deletion.
diff --git a/app/src/main/java/me/hufman/androidautoidrive/carapp/notifications/PhoneNotifications.kt b/app/src/main/java/me/hufman/androidautoidrive/carapp/notifications/PhoneNotifications.kt
@@ -381,12 +381,14 @@ class PhoneNotifications(val iDriveConnectionStatus: IDriveConnectionStatus, val
 				}
 
 				val played = if (notificationSettings.shouldPlaySound()) {
+					audioPlayer.requestDuck()
 					audioPlayer.playRingtone(sbn.soundUri)
 				} else false
 
-				if (notificationSettings.shouldReadoutNotificationPopup(passengerSeated) && played) {
+				if (played) {
 					Thread.sleep(3000)
 				}
+				audioPlayer.releaseDuck()
 				readoutInteractions.triggerPopupReadout(sbn)
 			}
 		}

diff --git a/app/src/main/java/me/hufman/androidautoidrive/notifications/AudioPlayer.kt b/app/src/main/java/me/hufman/androidautoidrive/notifications/AudioPlayer.kt
@@ -2,6 +2,8 @@ package me.hufman.androidautoidrive.notifications
 
 import android.content.Context
 import android.media.AudioAttributes
+import android.media.AudioFocusRequest
+import android.media.AudioManager
 import android.media.RingtoneManager
 import android.net.Uri
 import android.os.Build
@@ -18,6 +20,9 @@ class AudioPlayer(val context: Context) {
 	val timeSinceLastPlayed: Long
 		get() = SystemClock.elapsedRealtime() - timeLastPlayed
 
+	private val audioManager = context.getSystemService(AudioManager::class.java)
+	private var duckRequest: AudioFocusRequest? = null
+
 	fun playRingtone(uri: Uri?): Boolean {
 		if (timeSinceLastPlayed < PLAYBACK_DEBOUNCE) return false
 		uri ?: return false
@@ -38,4 +43,36 @@ class AudioPlayer(val context: Context) {
 		}
 		return true
 	}
+
+	fun requestDuck() {
+		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+			val duckRequest = AudioFocusRequest.Builder(AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK).run {
+				setAudioAttributes(AudioAttributes.Builder().run {
+					setUsage(AudioAttributes.USAGE_MEDIA)
+					setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
+					build()
+				})
+				setAcceptsDelayedFocusGain(false)
+				build()
+			}
+			val success = audioManager.requestAudioFocus(duckRequest)
+			if (success == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
+//				Log.i(TAG, "Successfully ducked audio $success")
+				Thread.sleep(500)   // wait for fadeout before playing notification sound
+			} else {
+				Log.i(TAG, "Error while ducking audio ($success)")
+			}
+			this.duckRequest = duckRequest
+		} else {
+//			Log.i(TAG, "Skipping audio duck on old phone")
+		}
+	}
+
+	fun releaseDuck() {
+		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+			val duckRequest = this.duckRequest ?: return
+			audioManager.abandonAudioFocusRequest(duckRequest)
+		}
+		this.duckRequest = null
+	}
 }
diff --git a/app/src/test/java/me/hufman/androidautoidrive/notifications/NotificationAppTest.kt b/app/src/test/java/me/hufman/androidautoidrive/notifications/NotificationAppTest.kt
@@ -483,6 +483,8 @@ class NotificationAppTest {
 
 		// plays the ringtone when showing statusbar icon
 		verify(audioPlayer).playRingtone(any())
+		verify(audioPlayer).requestDuck()
+		verify(audioPlayer).releaseDuck()
 
 		// reads out the new notification
 		verify(readoutController).readout(listOf("Chat: ", "Title: Text"))
@@ -513,6 +515,8 @@ class NotificationAppTest {
 
 		// plays the ringtone with the popup
 		verify(audioPlayer).playRingtone(any())
+		verify(audioPlayer).requestDuck()
+		verify(audioPlayer).releaseDuck()
 
 		// reads out the popup
 		verify(readoutController).readout(listOf("Chat: ", "Title: Text"))